JPS6139388Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a filter unit knob structure that allows the filter unit detachably attached to the front of a television camera to be easily removed.
Moreover, it is an object of the present invention to provide a filter unit knob structure that can reduce the protruding height so as not to intrude into the visual field of the imager.

As shown in FIG. 1, a television camera generally consists of a zoom lens 1, a camera head 2 housing predetermined academic and electronic components, an electronic viewfinder 3, and a shoulder pad 4. A substantially plate-shaped filter unit 7 is installed between the mount 5 provided on the front surface of the camera head 2 to which the zoom lens 3 is attached, and a first relay lens (not shown) assembled inside the camera head 2. It is detachably attached from the side surface 2a side of 2. A pair of knobs 7a and 7 are provided at both upper and lower corners of the filter unit 7, respectively.
b, and when the unit 7 is inserted into the predetermined position as shown in FIG. 1, both the knobs 7a and 7b are formed to protrude outward from the level of the side surface 2a. Therefore, when pulling out the unit 7 for cleaning the filter, etc., use your thumb and forefinger to hold these knobs 7a, 7.
It is relatively easy to remove by holding b.

On the other hand, when taking an image, there are many opportunities to not only look into the electronic viewfinder 3 but also to stare directly at the subject. However, the protruding knobs 7a and 7b located in front of the photographer are always interposed between the naked eye and the subject and obstruct the field of view, resulting in the disadvantage that they are extremely cumbersome and difficult to photograph.

The present invention eliminates the above-mentioned drawbacks, and an embodiment thereof will be described below with reference to the drawings.

2A and 2B are a vertical sectional view and a partially cutaway front view of a filter unit 8 to which an embodiment of the filter unit knob structure of the present invention is applied. 1
0 is a disc-shaped filter wheel, and a central hole is formed in the center of the filter wheel. A plurality of different filters 11a, 11 are arranged around this central hole.
b, 11c, 11d (11) are attached. A cylindrical shaft 1 is loosely fitted into this central hole.
2 are fitted together, and a screw 13 is inserted into the shaft 12 from the cover half body 20 side, which will be described later, to fix the shaft 12 to a cover half body 30, which will be described later. A spacer 14 is pressed by a leaf spring 15 and abuts near the center hole of the filter wheel 10. Therefore, this filter wheel 10 is pivotally supported by both cover halves 20 and 30, and when this filter unit 8 is inserted,
By rotating the exposed peripheral surface 10a of the filter wheel 10 by a predetermined angle, the center of the filter 11 is positioned on the line connecting the center of the mount and the center of the first relay lens.

Reference numeral 20 denotes a cover half that is located on the mount side when the filter unit 8 is inserted into the predetermined location described above, and as is clear from FIG. Ori,
Approximately in the center of this pivot 21 is a tapered center hole 2.
1a is bored. Furthermore, the other edge relative to this pivot 21, that is, the side surface 2a of the television camera
Threaded holes 22, 22 are provided at both upper and lower corners of the side.

Reference numeral 30 denotes a cover half located on the first relay lens side when the filter unit 8 is inserted into the above-described predetermined location, and as is clear from FIG. 4B, it has a substantially symmetrical shape with the cover half 20. There is.
A pivot portion 31 is also formed at the edge of this cover half 30, and this pivot portion 31 is provided with a threaded hole 31a into which the tip of the aforementioned screw 13 is screwed. Holes 3 are provided at both corners of the other edge facing this pivot 31.
2, 32 are drilled, and these holes 32, 3
2 and the screws 9, 9 are screwed into the aforementioned threaded holes 22, 22, and the cover halves 20, 30 are integrated. Reference numeral 33 denotes a mounting portion having a substantially U-shaped cross section that is integrally formed with the cover half 30. This mounting portion 33 is provided with a threaded hole 33a, and a threaded hole 33a is provided on the side of the first relay lens. The filter unit 8 is fixed between the mount and the first relay lens by inserting the screw 33b into the threaded hole (not shown).

Knobs 25 and 26 are integrally formed in the corners of the cover half 20 located near the screw holes 22 and 22, and the above-mentioned knobs 25 and 26 are integrally formed in the corners of the cover half 30 located on the holes 32 and 32 side. Knob halves 35 and 36 having the same configuration as the knob halves 25 and 26 are integrally formed, and by integrating both cover halves 20 and 30 by the above-mentioned means, the knob halves 25 and 26 are integrated. 35 are integrated, and the knob half 26 and the knob half 36 are integrated. Hereinafter, only the knob halves 25 and 26 of the cover half 20 will be explained, and the description of the knob halves 35 and 36 of the cover half 30 will be omitted.

The pair of knob halves 25 and 26 have an axisymmetric shape with the center line 22a of the screw 33b as the axis of symmetry,
When the filter unit 8 is inserted into the above-mentioned predetermined location, it is provided so as to protrude outward from the level of the side surface 2a of the television camera by the joint of the cover half 20. The inner surfaces 25a, 26a of the two knob halves 25, 26 gradually rise from the center line 22a in a smooth curve, and rise slightly in a straight line in the middle. The end surfaces 25b, 26b of the two knob halves 25, 26 are substantially parallel to the side surface 2a of the television camera, and the end surfaces 25b, 26b are flat-knurled, as is clear from FIG. 3B. Furthermore, the outer surfaces 25c, 26c of both the knob halves 25, 26 are bent into hook shapes, and saddle portions 25d, 26d are provided. Flat knurling is also cut on the outer surfaces 25c and 26c. Therefore, the thumb and index finger are placed on both outer surfaces 25
c, 26c, both fingers touch both saddles 25d,
26d, the filter unit 8 can be easily pulled out. This eliminates the need to form the knob halves 25, 26 so as to protrude far beyond the level of the side surface 2a of the television camera as in the prior art, and the height of their protrusion can be reduced.

As mentioned above, the knob structure of the filter unit of the present invention is located at both upper and lower corners of a substantially plate-shaped filter unit that is removably attached from the side of the television camera between the mount and the first relay lens. In the knob structure of the filter unit, which includes a pair of knobs that are provided as a pair of knobs and protrude outward from the level of the side surface of the television camera, both saddle parts are provided on the outer surfaces of the pair of knobs. Since the thumb and forefinger can be hooked onto the filter unit, the filter unit can be easily removed.As a result, the protruding height of the knob can be lowered compared to conventional methods, and the field of view of the imager can be reduced. It has features such as no significant interference, improved operability of the television camera, and the ability to perform accurate camera work.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a conventional television camera.
Figures 2A and B are longitudinal sectional views and partially cutaway front views of a filter unit to which an embodiment of the filter unit knob structure of the present invention is applied, and Figures 3A and B are front views of half of the knob. and side view, 4th
Figures A and B are a side view and a front view of the cover half. 1...Zoom lens, 2...Camera head, 2
a... Side, 5... Mount, 8... Filter unit, 10... Filter wheel, 11... Filter, 20, 30... Cover half, 25, 2
6, 35, 36...knob half, 25c, 26c
...Outer surface, 25d, 26d...Saddle part.

Claims (1)

[Scope of utility model registration request] The filter unit is provided at both upper and lower corners of a substantially plate-shaped filter unit that is removably attached between the mount and the first relay lens from the side of the television camera, and is located outside the level of the side of the television camera. A filter unit knob structure comprising a pair of knobs protruding toward each other, wherein a saddle portion is provided on the outer surface of each of the pair of knobs.